The conception of strain intensity factorKIε was introduced.

Effect of sprayed coatings on stress intensity factor of weld toe crack of cruciform welded joints;

Analysis of stress intensity factor of crack of elastic film;

The analysis and research of crack top s stress intensity factor and correction coefficient of thin pipes;

A numerical method for determining stress intensity factors at the interface edge of bonded materials;

Calculating analysis of stress intensity factors at the junction within high strain gradient;

Computation of stress intensity factors for bimaterial V\|notchand heel of concrete dam on rock foundation;

Analysis on the stress intensity factor(SIF) for mixed-mode crack at bottom base layer with weight functions expressed with matrix;

On the basis of computing the stress intensity factor(SIF) of three dimensional crack with this modified slice synthesis method,we,considering the plastic .

In virtual crack closure technique(VCCT),the energy release rate is computed based on the results of finite element calculation,and the stress intensity factor(SIF) is computed from the energy release rate.

In allusion to leakage blockage method by sticking of pore defect, the calculation process of toughness stress strength factor in the glue interface is given through the bulge test model analysis, and the critical bulge radius of split crack inter-cohesion break of epoxy resin glue is evaluated by means of brittle break criterion of break mechanics.

Using the LFEM theory, the author provided the computing method of stress strength factor of crack and the criteria of crack instability propagation and propagation angle.

A computation program has been developed,using a two dimension boundary element method,for calculation of stress strength factor at the welding crackle tip.